Security News > 2023 > January > Botnets exploited Realtek SDK critical bug in millions of attacks

Hackers have leveraged a critical remote code execution vulnerability in Realtek Jungle SDK 134 million attacks trying to infect smart devices in the second half of 2022.

Unit 42 logged activity leveraging CVE-2021-35394 from all over the world but almost half of the attacks originated from the United States.

"From August 2021 to December 2022, we have observed 134 million exploit attempts in total, targeting CVE-2021-35394, with 97% of these attacks occurring after the start of August 2022," reads Unit 42's report.

"More than 30 international regions were involved as the attack origins, with the United States being the largest source of attacks at 48.3% of the total. Vietnam, Russia, The Netherlands, France, Luxembourg, and Germany were also found to be in the top seven countries from which we observed threat actors taking part in these attacks" - Palo Alto Networks Unit 42 Realtek SDK flaw details.

CVE-2021-35394 is a critical vulnerability in Realtek Jungle SDK version 2.x to 3.4.14B, caused by multiple memory corruption flaws that allow remote unauthenticated attackers to perform arbitrary command injection.

Realtek fixed the flaw on August 15, 2021, along with other critical severity flaws like CVE-2021-35395, which was extensively targeted by botnets that incorporated exploits mere days after its disclosure, and as recently as last December.

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